Saw-set gage.



No. 887,742. .PATENTED MAY 12, 1908. J. s. SCOTT.

SAW SET GAGE. APPLICATION FILED AUG.27.1906.

Inventor,

% Attorneys JOHN SMITH SCOTT, OF FREDERIGTON, NEW BRUNSWICK, CANADA.

SAW-SET GAGE.

Specification of Letters Patent.

Patented May 12, 1908.

Application filed August 27, 1906. Serial No. 332,115.

T 0 all whom it may concern:

Be it known that I, JOHN SMITH SooTT, a subject of the King of GreatBritain, residing at Fredericton, county of York, in the Province of NewBrunswick, Canada, have invented certain new and useful Improvements inSaw-Set Gages; and I do hereby declare that the following is a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to saw teeth gages, and, generally speaking, isdevised in such manner as to readily ascertain thereby the exact set ofany individual tooth to whic the instrument may be applied.

One object of the device is to so construct the same as to preventcanting of the gage relative to the saw blade.

Another object is to provide a device of this general class, having anindex combined therewith whereby the exact deviation of a tooth from itscorrect or normal position may be indicated.

Another object is to provide a gage wherein the parts are so connectedas to allow the gaging point to be set at any desired positioncorresponding to the various sets of saw teeth.

Broadly speaking, the device comprises a ring-shaped handle,- providedwith parallel jaws extending therefrom adapted to receive a plate, wingsembracing said plate and slidable thereon, a gaging point fastened tosaid wings, means for moving said wings and the gaging point attachedthereto, and means for indicating the movement of said-parts.

In order to more clearly set forth and de-.

scribe the invention, reference should be had to the accompanyingdrawings hereto attached,in which similar reference characters refer tolike parts throughout the several figures.

In the drawings: Figure 1 is a side elevation of the gage; Fig. 2 is atop plan view; and, Fig. 3 is a side elevation taken on the sideopposite to that illustrated in Fig. 1. Fig. 4 is a fragmentary detailin side elevation of the plate and traveling roller.

Referring to the drawings, 1 indicatesa ring-shaped handle, by which thedevice may be moved over the surface of the saw, provided with fingerholes or notches 4 and guide lugs 3.

Extending from the handle portion are parallel jaw members 2, adapted toreceive and hold therebetween the plate 5. The plate 5 is provided withan offset or lug 7, in alinement with the lug 3 on the handle, andadapted to cooperate therewith to space the device from the blade of thesaw, so that it may be readily moved thereover. Adjustably mounted onthe plate 5, are the parallel wings 11. Clamped between the outer endsof said wings, is the gage proper or gage point 12, fastened by rivets13 to said wings.

In order to adjust the gage point to any desired point for gaging sawteeth of various standard sets, the plate 5 is provided with a recess 8,having mounted thereon a screw- ,threaded rod 9, on which travels theroller 10. Wings 11 are provided with notches, the surfaces of whichform shoulders which engage the upper and lower faces respectively ofthe traveling roller 10, and thereby move the wings 11 and the gagepoint 12 connected thereto.

In order to preserve absolutely parallel movement of the parts, theedges of the wings 11 and the abutting ends of the jaws 2 are madeparallel, whereby the wings are guided in their movement on the plate 5.The wings 11 are provided near their rear ends with slots 14, adapted toreceive guide plates 15, mounted on a pin 16, which passes through theblade 5, bearing at one end a thumb nut 17 and at its opposite end apointer or index needle 20, adapted to 005perate with a scale 21 markedon an adjacent edge of the wing 11.

Obviously, in order to adjust the device to any desired set, all that isnecessary is simply to loosen the thumb nut 17, whereby the wings 11 areloose to slide upon the plate 5 to rotate the roller 10, thereby causingit to travel on the rod 9, and to carry with it the win s 11 and thepoint 12 attached thereto, unti the desired set is attained, as willbeindicated by the pointer and index above referred to, and to thentighten the thumb nut 17 to again clamp the parts in their adjustedrelation.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is

1. A device for gaging the set of saw teeth comprising a handle having aplate extending therefrom, a saw engaging surface on said handle andsaid plate, at a right angle to the plate, wings slidably mounted on theopposite sides of said plate, a gage point attached to said wings, saidwings and gage point being adjustable with. respect to said saidshoulders, to thereby move the same saw engaging surface.

upon the said plate, and a gage point at- 2. In a device of thecharacter described, tached to the Wings. a handle having a plateextending there- In Witness whereof I have hereunto set 5 frogln, adsmivengaging sfirface 1on said halndle my hand in the presence of tWoWitnesses. 15

an sai ate, at a rig t ang e to the ate, T Wings slidhbly mounted onopposite sides of l JOHN SMITH SCOTT said plate and provided Withshoulders, a Witnesses: threaded rod on said plate, a traveling rollerF. B. SMIT 10 threaded on said rod and engaging under F. J. LYNN.

